Or, should I focus on just holding these forever type deal and build a cashflow monster? 

Since your lot is already zoned RS3, you can (by right) build a new SFH or 2-flat.

I have seen people buy non-existant properties, bottom of lake (literally underwater), slivers of land too narrow or small to do anything, Army bombing range, expired leases, cell tower now removed, property with 30 year lease and prepaid rent for 30 years, condemned buildings, toxic waste sites, land under railroad tracks, cliffs, landlocked property, wetlands, flood zone, unbuildable property, endangered species habitat, ....I have three rules for buying at Tax Sale:1.

When it comes to real estate, here's a general list of eligible assets and their depreciable lifespans that you should know: Residential Rental Property = 27.5 yearsThis includes any building or structure where 80% or more of its gross rental income is from residential units.That means:- Apartment buildings- Single-family rental homes- Duplexes, triplexes, and quadplexes- Mobile homes (used for residential rental)- Any kind of residential lodging facility where the primary purpose is long-term rentalCommercial Property = 39 yearsThis includes non-residential properties like:-Office buildings-Retail stores and shopping centers-Warehouses-Industrial complexes-Hotels and motels that do not qualify as residential rental propertyLand Improvements = 15 yearsThese include sidewalks, roads, fencing, some landscaping, and parking lots that are separate from the building.Personal Property = 5 or 7 yearsPersonal property used in a rental activity usually has a 5 or 7-year life.This includes most furniture, appliances, carpeting and various machinery.Qualified Improvement Property (QIP) = 15 yearsGenerally, this includes any improvements made to the interior of a non-residential building after the building was placed in service, excluding elevators, enlargements, and the internal structural framework.Computers and Related Peripheral Equipment = 5 yearsVehicles = 5 yearsNote that the land itself is not depreciable.

overbuilt. just google Austin and over delivered or overbuilt and you'll find your answer. strong market, expensive land, expensive to build. 

And then a client's new build in the suburbs of Denver that cost $800,000 and should get around $85-$90k, so 10.5-11%. 

I am trying to tabulate Business that may have higher depreciation but yet help me build wealth in form of real estate or potential customers for variety of services. 

If you play your cards right, this could be a great way to build equity and add value to the property.

I would reach out to him if you are a real estate investor who is looking to build your portfolio in Florida. 

A developer had already worked out deals with the owners of the other 5 buildings and finally got the 6th and final building under contract.